647839-16-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 647839-16-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,4,7,8,3 and 9 respectively; the second part has 2 digits, 1 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 647839-16:
(8*6)+(7*4)+(6*7)+(5*8)+(4*3)+(3*9)+(2*1)+(1*6)=205
205 % 10 = 5
So 647839-16-5 is a valid CAS Registry Number.